MATLAB: Please how can I unstack a column of negative and positive values into 2 columns of positive and negative values respectively

Question

sr=[-34;45;28;-10;-9]. s=sign(sr). I want to obtain sr1=[-34;-10;-9] and sr2=[45;28]

Answer 1

p=sr(sr>0);  % positive only
n=sr(sr<0);  % negative only, you'll have to decide where zero goes if it exists...

or,

ix=sr>0;  % logical vector
p=sr(ix);
n=sr(~ix);  % eliminate the test once at expense of temporary variable